Drift-pin puller.



Patented Mar. 2, 1915.

llVl/E/VTOR Michael T. Devine A TTOHNE Y 8 THE NORRIS PETERS C0 FHOTO-LITHO. WASHING roN. D. c

" oron.

DRIFT-PIN FULLER.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed June 19, 1912. Serial No. 704,632.

To all whom it may concern:

Be it known that 1, MICHAEL T. DEVINE, a citizen of the United States, and a resident of Pierre, in the county of Hughes and State of South Dakota, have invented a new and Improved Drift-Pin Puller, of which the following is a full, clear, and exact description.

This invention relates to implements for pulling spikes, nails, pins, or .the like, and has particular reference to an implement of this nature which iscbetter adapted than those usually employed for use in connection with bolts or pins which are to be pulled rapidly and with great force and which, furthermore, are to be preserved in straight condition.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claim.

Reference is to be had to the accompanying drawings forming a part of this specification in which like characters of reference indicate corresponding parts in all the views, and in which Figure 1 is a side elevation of the preferred embodiment of the invention as applied for use, a portion of the jack being 7 broken away; Fig. 2 is a front elevation of the device, parts of the toes being in section; Fig. 3 is a transverse sectional detail of a modification; and Fig. i is a transverse sec- 7 tion on the line H of Fig. 1.

Referring particularly to the drawings for a description of the construction, I show at 10 a jack shank 11 of any suitable size, form or strength, and arranged substantially at right angles thereto is a foot 12. The outer end of the foot is formed into a pair of toes 18 of any suitable length and between said toes is provided a space 13 said space being bounded in the rear by an undercut and curved wall 12*. As indicated in Figs. 1 and 2 the opposing inner walls of the toes 13 are provided with open-topped sockets 1a in transverse alinement with each other.

The numeral 16 indicates an eccentric having gudgeons 17 adapted to drop into the sockets 1e and constituting a pivotal bearing or support for the eccentric. The eccentric 16 may be of any suitable form or size and is adapted to extend sufficiently far toward the wall 12 of the shank to cause the pin or device to be operated uponby the implement to be clamped snugly within the aforesaid space 13 by virtue of' the eccentricity of the eccentric. The particular form of sockets 1 1 shown in Figs. 1 and 2 makes it expedient for eccentrics of diflerent SIIZQ or eccentricity to 'be used in connection with a single shank and to readily exchange one for another if the devices being operated upon vary in size or construction, making such change desirable. Another object of the ready removability of the eccentric is to provide for the application of the implement to a spike or bolt which may have a head which would otherwise render it impossible for the tool or implement to be applied thereto. In other words, by lifting out the eccentric, the toes 13 may be caused to span the bolt, even though said bolt may have a head, and the eccentric may then be dropped into place, automatically operating to clamp the bolt as before described.

In Fig. 3 is shown a similar shank 11 and toes 13 between which is formed a space 13 as before. The eccentric 16, however, is shown journaled loosely upon a pivot bolt 1 f extending transversely through said toes 13. The operation of this form of the invention is similar to that above described.

Considering the device illustrated at 18 as a drift pin used in connection with bridge construction or elsewhere where metallic plates are being assembled, said pin will be driven as usual, but it is either undesirable to drive the pin out because of the damage to its point which would result, or for the reason that the smaller or inner end of the pin is many times inaccessible for this purpose; therefore, in applying the device, as herein set forth, to the pin, and lifting the shank 11, the pin 18 will be drawn properly and yet will not be damaged by bending or the like. After the pin is withdrawn a sli ht tap on its point will release the grip of the eccentric thereon.

The herein described implement may be constructed of any suitable material and the parts thereof may be proportioned as best suited for any particular purpose. It is to be noted that the eccentric may be knurled on its gripping surface if found desirable, but this is not essential in all cases.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is A drift pin puller comprising a handle forming bar having one of its ends bent at a right angle to provide a foot including two claws held in parallel spaced Elation;

With flat outer base forming faces and rounded ends, the Wall formed at the union of said claws being curved and extending at an acute angle to the axis ,of said bar so that the upper end of said Wall forms a biting g eons fer coact'i 0n With said sockets, the ends of said claws belng rounded.

Intestimony whereof I have signed my name tothis specification in the presence of t' e subscribing Witnesses.

MICHAEL T. DEVINE.

WVitnesses :Y 7 i L. J. DUTGHER, A; BINN. V

Co in 9! this, patent may be dbtai ned for five cents each, by addressing the Commissieher ef Patents,

Washington, D. G. V I 1 V i 

